Pump.



EVERET'I P. LARSH, OF DAYTON, OHIO, A-SSIGNOR T0 THE BURNETT-LARSH MANU- FACTUIRING CO., OF DAYTON, OHIO, A CORPORATION OF OHIO.

PUMP.

Specification of I .etters Patent.

Patented oet. 2, 1917.

Application led February 19, 1917* Serial No. 149,496.

To all whom t may concern:

Be it known that I, Evnnn'r'r P. LARsH, citizen of the United States,*residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Pumps, (Case C,)' of which the following is a specification.

My invention relates to pumps and more particularly` to that type of pump commonly known as force pumps, especially adapted for use in water distribution systems, but also capable of use as a bilge pump, for drainage and for otherpurposes. The invention relates more particularly to .the valve operation and the use of auxiliary ports or vents with which the valves co-act.

The object of the invention is to simplify l the structure as well as thel means and mode of operation of such devices, whereby they will `not only be cheapened in construction, but will be more efficient in use, positive in operation, automatic in action, and unlikely to become clogged or out of repair.

A primary object of the invention is to provide improved means for automatically priming the suction valves of such pumps, whereby they will be maintained in operative 'condition throughout extended periods of non use. Thisis accomplished by pro viding for the return of sulicient water from the distribution system to maintain the suction valves in a water sealed condition.

A further object ofthe invention is to provide improved mea-ns for the escape of any excessive quantity of air which may be entrapped in the pump cylinder, thereby preventing the pump from becomingair bound. i

The present construction is further designed to facilitate the supplying of air in sutlicient quantity -to the distribution line and storage tank to prevent the distribution system becoming water-logged.

A further object -of the invention is to provide improved means for clearing or wiping the relief and priming ports thereby preventing the deposit of sediment or foreign matter which might itend to clog Said ports or otherwise interfere with their successful operation.

With the above primary and other incidental objects in view as will more Afully appear -in the specification, the invention consists'of the features of construction, the parts and combinations thereof, and the mode of operation or their equivalents, as hereinafter described and set forth in the claims.

Referring to the drawing Figure 1 is a vertical, longitudinal sectional view of the pump body and operating mechanism of a pump of the horizontal reciprocatory type embodying the invention forming the'subject matter hereof. Fig. 2 is `an-enlarged detailed Sectional view of the discharge and auxiliary port valve mechanism, showing by solid lines the valve in its open position and by dotted lines the closed position thereof. Figs. 3 and .l illustrate modifications. l

Like parts are indicated by similar characters of reference throughout the several views.

In the drawing the invention forming the ,subject matter hereof has been shown embodied in a pump of horizontal reciprocatory type. It is to be understood however that the invention is not limited to this particular type of pump, but may be embodied in pumps of other types, and of different construction Such embodiment in pumps of other types being within the skill of ordinary mechanics, skilled in Ipump manufacture and construction, have not been illustrated in the present drawing but are to be understood as included in the scope of the present invention.

In the drawing there is shown a main pump body or housing 1 of a` reciprocatory pump ofhorizontal type, within which housing l is inclosed the operating parts of the pump mechanism. Mounted within the housing l is a pump cylinder 2 supported and arranged therein in such manner as to form about the exterior of the pump cylinder 2, an annular intake chamber 3. This intake chamber 3 communicates through an inlet or supply orifice 4L lwith the source ofv water supply. Located Within the cylinder 2 is a reciprocatory piston 5 the piston rod or stem 6 of which extends through a packing gland 7. Any suitable means may be employed for actuating the reciprocatory piston 5. This may comprise either manually or power operated means. It may consist of a lever, a crank, a power piston or any other convenient and suitable form of operating device, as are now commonly used in pump construction and operation. The interior ofl the housing or casing l above the cylinder 2 is divided by a horizontal partition or deck 8 forming a discharge chamber 9 thereabove With Which connnunicates a dome or air chamber 10. The outlet or discharge conduit 11 leads from the chamber 9. That portion of the housing casing 1, intermediate the .deck or partition 8 and the cylinder', is divided by a vertically disposed medial wall 13 into two compartments 14 and 15 which comi'nunicate through downward extending passages or extensions of such chambers with the opposite ends of the cylinder 2. These chambers 14 and 15 also communicate through inlet ports 16 and 17 respectively, with the annular vintake chamber 3. The inlet ports 16 and 17 are controlled by independently operated valves 18 and 19. These valves are of the suction operated type, and may be of any suitable form. In

the drawing they have been illustrated as disks normally seated upon valve seats 20 and 21, and movable vertically upon the stems against the tension of retracting springs The form of valve shown in the drawing is commonly employed in pumps of this character. It is obvious however that valves of other shape and construction may be substitutedtherefor.

The valves 18 and 19 are alternately untrolled by independently operated valves 26' and 27. In the drawing these valves have been shown as consrstmg of disks which are vertically movable upon the stems 28 against the tension of the retracting springs 29.

The construct-ion and arrangement is such that as the piston 5 moves toward the left in the cylinder 2 the valve 19 is elevated ofi' its seat against the-tension of the retracting spring 23 to admit acharge of Water from the intake chamber 2 through the port 17 to the chamber 15, and then into the open right hand end of the cylinder 2. At the same time the movement of the piston displaces the Water previously drawn into the left hand end of the cylinder through theintake port 16. The water displaced by the movement of the piston is forced outward through the chamber 14 and thence through the discharge port 24, forcing the valve 26 o its seat against the tension of the retracting spring 29, and thence discharges into the discharge chamber 9. Upon reversal of the movement ofthe piston, the operation of drawing in and discharging water is reversed and the Water is drawn from the intake chamber 3 into the cylinder 2 through the inlet port 15 and the water displaced by the movement of the piston toward the right is discharged from the cylinder through the chamber 15 and valved port 25 intoA the discharge chamber 9. F rom theQ discharge chamber 9 the water is conducted as before mentioned through the outlet conduit l1.

Under some conditions of use, air in quantities gains admission to the inta-ke or supply pipe line or to the pump itself, through leakage or otherwise, such air is drawn into the pump cylinder and the chambers 14 and 15 causing the pump to become air bound. If no means is provided for its escape, the air Within the cylinder will be alternately vcompressed and expanded as the'piston is re'- ciprocated. The pressure of air being insufficient to lift the discharge valves 26 and 27 against the back pressure of the distribution line, remains in the pump Where it interferes with the pumping operation.

To provide for the escape of such excess of air, and for the further purpose of providing for the return of suiiicient Water to .the chambers 14 and 15 Atoat all times water seal the suction valves 18 and 19, or to automatically prime said valves, by passes are provided vin the vertical valve stems 28. These by -passes comprise longitudinalI bores or conduits 30` `communicating with'the horizontally disposed ports 31.

opening through the side of the valve stem into the discharge chamber. At such times as the valves 26 and 27 are seated the ports or vents 31 are open to permit the free escape of entrained air from the chambers 14 and 15 which may pass through the conduit 30 and lateral ports 31 into the discharge chamber 9 and thence into the outlet or discharge conduit 11 to the distribution system. The auxiliary ports'l also permit the return flow of water from the discharge chamber 9 to the chambers 14 and 15, When the pump is at rest, in sufficient quantities to insure the proper priming or water sealing of the suction valves 18 and 19. The auxiliary ports are quite smallin size. The quantity which may be drawn through such ports into said chambers from discharge chamber upon the suction stroke of the piston is a negligible quantity. By arranging them in horizontal position, the possibility of the ports being clogged by sediment or scale is reduced to minimum. I am aware that heretofore vertically opening ports have been. provided in the valve plate or deck, as for instance in the deck 8 between the chambers or in some instances in the rim of the discharge valve seat. However such ports quite likely to Vcollect sediment and deposit l particularly when located adjacent to the bottom of the discharge chamber. In the present instance such difficulties are overcome by locatino the relief and priming port in a substantially horizontal position in the valve stem 2S. Furthermore these ports are located in the valve stem in positions elevated above the bottom of the chamber. The ports are positioned above the level of the valves 26 and 27 whereby the ports 31 areopened for free passage of air and water when the valves 26 and 27 are seated as shown in Fig. 1. The valves travel in their unseating or opening movement to positions beyond the ports 31 whereby the ports 31 are closed so long as the valve body is elevated and the -corresponding ports 24 and 25 are open.

The vertical vibration of the valves 2G and 27 upon the valve stems 28`serves to constantly wipe the ports 31 and the portions of t-he valve stems adjacent thereto thereby dislodging any sediment or scale which might be deposited thereon and which Vmight later tend 'to clog said ports. The valve thus serves to keep said port clean and open. It is to be noticed that the valve 26 is common to the main port 24, and the port'31 of the corresponding valve stem and that .the valve 27 bears like relation to the port 25 and the corresponding port 31. These valve bodies serve to close the main ports or passages when in their lowermost position and to open the auxiliary ports 31. In their elevated position they serve to close theauxiliary ports31 and open the main or primary ports 24 and 25. The

' valve bodies 2G and 27 common to both the water from the discharge chamber to the chamber beneath when the valve is seated to close the main primary port, it also in its elevated position, eventually closes the auxiliary port. 31, toprevent the passage of water therethrough into the discharge chamber. The ports 31 are thusintermittently operated being alternately opened and closed bythe movement of the valve body.

In Figsl 3 and 4f are shown modifications yof the construction before described in which the valve and stem are integral. In Fig. 3 the valve head 32 isprovided with an upturned stem 33Which reciprocates in a guide 34. A ybypass 35 extends through port thereln.

the head 32 of the valve and thence through the valve stem 33, and is provided with a vlateral port 3G below the guide sleeve 3l.

The construction is such that so long -as the head 32 is seated the 'port 36 is exposed. However upon upward movement of the valve and valve. stem, the port 3G is carried within the guide sleeve 3l' by which it vis closed so long as the valve head 32 remains off its seat 3T. The reciprocatorv movement of the stem 33 within the guidc 3l affords a wiping action which effectually dislodges any sediment or other foreign matter deposited in the vicinity of the port 36.

In Fig. l the construction is quite similar to that in Fig. 3 except that the stem 33l extends downward. The port 3G corresponding to the port 36 is normally open so long as the valve head 32a seated. Upon the elevation of the valve head 32n from its seat., the reciprocatory movement of the stem draws the port 36a within the guide sleeve 3&3. This reciprocatory. movement of -the stem affords the wiping action before referred to.

From the above description it will be apparent that there is thus provided a device of the character described, possessing the particular features of advantage before enumerated as desirable, but which obviously is susceptible of modification in its form, proportion, detail construction or ar-rangen'ient of parts, without departing from the principle involved or sacrificing' any of its advantages.

lVhile in order to comply with the statute, the invention has been described in language more or less specific as to certain structural features. it is to be understood that the in'- vention is not limited to any specific details, but that the means and construction herein described comprise but one mode of putting the invention into effect, andthe invention is therefore claimed broadly in any of its possible forms or modifications Within th scope of the appended claims.

Having thus described my invention. I claim 1. In a construction of the character described, a valve, a valve seat therefor, a valve stem by which the valve is guided to and from its seat, said valve stem having an auxiliary by-pass therein.

2. In a construction of the character described, a valve, a valve seat therefor, a stationary valve stem by which the valve is guided to and from its seat, said valve stem having an auxiliary by-pass therein.

3. In a construction of the character described, a valve, a valve seat therefor, a valve stem by which the valve is guided to and from its seat, said valve stem having a by-pass provided with a laterally disposed t. In a construction of the character described, a valve., a valve seat therefor, a valve stem by which the valve is guided to and from its seat, said valve stem having a longitudinal bore therein and a lateral bore intersecting the longitudinal bore thereby forming a by-pass in said valve stem.

5. In a construction of the character described, a port, a by-pass, and a valve common to the port and by-pass alternately opening and closing the port and the bypass.

6. In a construction o f the character described, a valved port, a valve therefor, a by-pass and means whereby the mouth of the bypass is automatically cleared by the movement of the valve.

T. In a construction of the character described, a valved port, a valve therefor, a by-pass the port of which is so located that it will be closed by said valve when the valve is'unseated and open when the valve is seated. 8. -In a construction of the character described, a valved port, a valve therefor, and a by-pass the port of which is so located that it will be wiped by said. valve in its movement in relation with its seat.

9. In a construction of the character described, a valved port, a valve therefor, a valve stem for said valve and a by-pass located in the valve stem, the portion of the valve stem containing said port of said b vpass being wiped duringthe movement of the valve.

10. In a construction of the character de scribed, a valved port, a valve therefor` a. valve stem for said valve and a bypass located in the valve stem, the port of said by-pass being open when 1he valve is at one limit of its movement and closed when the valve 1s at the opposite limit of its movement.

scribed, a valved port, a Valve therefor, a valve stem lfor said valve and a by-pass located in the valve stem, the port of said bypass being alternately opened and closed by the movement of the valve.

12. In a construction of the character described, a valved port, a valve therefor, a valve Stem for said valve and a by-pass located in the valve stem, said port and bypass being alternately opened and closed by the movement of the valve.

13. In a construction of the character described, a valved port, a valve therefor, a valve stem for said valve and a by-pass located in the valve stem, said valve being adapted by its movement to cleanse the portof said by-pass.

let. In a construction of the character described, a valved port, a valve therefor, a valve stein for said valve and a by-pass located in the valve stem, the port of said vbypass being located in a lateral face of the valve stem in such position that the port will be exposed when the. valve is seated and covered upon the opening of said valve, the wiping action upon that portion of the valve stem containing' the port of said by-pass due to the movement of the valve servingv to dislodge any deposit of foreign matter.

ln testimony whereof, I have hereunto set my hand this 17th day of February, A. D.

lfllT. EVERETT l. LARSH. ll'itnesses Hanni F, onxx, Brama Trocs Fin'.

ll. In a construction of the character de- 

